[1]} argued that the most likely explanation for the turnover in the hotspot spectra below 1 GHz was a LEC in the electron energy distribution. A LEC may arise due to the dissipation of jet bulk kinetic energy in the hotspots [2]}. To test this interpretation, we model the spectrum by incorporating a LEC in a broken power-law electron spectrum that is inferred from the higher frequency data (e.g. [1]}, [4]}). To model the LEC, we assume a physically realistic low energy tail, rather than an instant cutoff in the electron energy distribution below some cutoff energy, which would produce a more sharp turnover. We use the standard continuous injection model, combined with a low-energy tail, defined as
\( N(\gamma ) &=& N(\gamma _{\rm cr}) \left( \frac{\gamma }{\gamma _{\rm cr}} \right)^2 \qquad \gamma < \gamma _{\rm cr} \nonumber \\N(\gamma ) &=& \frac{K_e \gamma _{\rm b}}{(a-1)} \gamma ^{-(a+1)} \left[ 1 - \left( 1 - \frac{\gamma }{\gamma _{\rm b}} \right)^{a - 1} \right] \qquad \gamma _{\rm cr} \le \gamma < \gamma _{\rm b} \nonumber \\N(\gamma ) &=& \frac{K_e \gamma _{\rm b}}{(a-1)} \gamma ^{-(a+1)} \qquad \gamma _{\rm b} \le \gamma < \gamma _{\rm 2}\) 
